If Taka 4,500 was invested in bonds of a corporation when the price per bond was Tk. 9.00 and Taka 3,000 was invested in bonds of another corporation when the price was Tk. 10.00 per bond, what was the average price of bonds purchased?

Correct Answer: Tk. 9.375
Total investment = 4500 + 3000 = 7500 TK. Number of Bonds = 4500/9 + 3000/10 = 800 Average price per bond = 7500 / 800 =  9.375 TK.